One question is why "he saw the siren voice" ? and not heard ?I guess it kept him reminded about his graft whenever he saw the siren voice of the boodler tip him the wink with a bribe in his hand.
From Cabbages and King by O Henry, chapter 6 "The Phonograph and the Graft"
The second question is - am I right to believe that "tip" and "wink" are synonyms of the word "bribe" here or the meaning is just ~ "boodler winking him offering a bribe"?
Thank you in advance!